Author
Arrigale, Lawrence M.
1
Barnard, Edward Sibley, 1936-
1
Becher, Drew
1
Briger, Catriona Bull
1
Elliott, Joseph E. B.,
1
Evans, Janet
1
Hildebrandt, Rachel
1
Keels, Thomas H.
1
Lemheney, Sam
1
Meyer, Paul W. 1952-,
1
Old York Road Historical Society
1
Pennsylvania Horticultural Society
1
Popkin, Nathaniel R.,
1
Poxon, Marita Krivda
1
Springirth, Kenneth C.
1
Stockbridge, Jeffrey,
1
Trimingham, Barrie (PACT),
1
Woodall, Peter,
1